| Firmware Version | Date | Stability | Recommended | | :--- | :--- | :--- | :--- | | V4.000.0000000.0.R.20190720 | July 2019 | Poor (NTP/mouse bugs) | No | | V4.000.0000000.1.R.20201010 | Oct 2020 | Medium | No | | | Mar 2021 | High | Yes | | V4.000.0000000.3.R.20211115 | Nov 2021 | Medium (cloud app issues) | Only if using P2P | | V4.002.0000000.1.R.20220808 | Aug 2022 | High | Yes (latest stable) |
: Supports 4-channel BNC audio input for cameras that transmit audio signals through the same coaxial cable as the video. Dahua Technology How to Update xvr1b04hi firmware